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Certificate
Name of the College:
Department of Civil EngineeringEngg. Geology Laboratory
____________________
Certified that this is the Bonafide Engg. Geology Lab Record of
Mr./Ms. ______________________________________ , Roll No. _____________,
B.Tech. (Civil) II/III Year, I/II Semester, of the year ____________.
Date: Lab Incharge
Internal H.O.D. ExternalExaminer Examiner
ENGINEERING GEOLOGY
LAB RECORD/MANUAL
Dr. N. CHENNA KESAVULUM.Sc., Ph.D. (IIT, Bombay)
Retired Professor of Geology, JNTU
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BOSTON (USA) ● ACCRA (GHANA) ● NAIROBI (KENYA)
Hyderabad (Andhra Pradesh)
ENGINEERING GEOLOGY : LAB RECORD/MANUAL
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PREFACE
Generally in the Engineering Colleges, the study of Engineering Geology practicals are limited to one
semester, i.e. for about sixteen weeks or classes. Hence, only very relevant practicals from civil engineering
point of view need to be stressed.
The Engineering Lab (record) usually has three important topics, namely, study of minerals, study of
rocks and study of model geological maps.
Among these, the study of minerals is covered first logically in terms of description and identification
of common minerals with the aim of enabling the concerned engineers to assess the suitability of site
rocks for constructional purposes. It also aims to recognise the common economic minerals, if they
happen to come across during their constructional works (such as ghat road cuttings, quarrying, tunnelling,
reservoir locations so on) so that it is brought to the notice of geologists to evaluate their importance and
to exploit the same in Nation’s interest, if worthy. Rocks are named commonly based on their mineral
content and also possess their physical properties based on their mineral constituents.
Next comes the study of common rocks (i.e. igneous, sedimentary and metamorphic rocks) dealing
with their description and identification. It takes into account not only the study of constituent minerals
but also their texture, structure, density (porosity), cementing material, acid reaction and appearance,
which influence the competence, durability and suitability of the rock. This is obviously of primary
importance from civil engineering point of view.
Then comes the study (interpretation) of model geological maps giving the geological details of
concerned areas in terms of topography, drainage pattern, slope, lithology, associating geological structures
(such as tilted, folded, faulted, unconformable and intruded strata), order of superposition, thickness of
beds and geological history, is learnt. This is of great importance from civil engineering point of view in
assessing the suitability of a site for location of dams, reservoirs and tunnels.
Thus these three aspects (study of minerals, study of rocks, study geological maps) are very important
in Engineering Geology practicals and therefore presented in this record, keeping in view the requirements
of civil engineering students.
—Dr. N. Chenna Kesavulu
LAB WORK
Serial Date Experiment Details Page No. Remarks
no. Minerals/Rocks/Maps
LAB WORK
Serial Date Experiment Details Page No. Remarks
no. Minerals/Rocks/Maps
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CONTENTS
Preface .... vii
PART-I
STUDY OF MINERALS .... 1
• Introduction .... 2
• Mineral .... 2
• Methods of Study of Minerals .... 2
PART-II
STUDY OF MINERALS
LAB WORK .... 9
(As per Syllabus)
Rock Forming Minerals and Ore/Economic Minerals
PART-III
STUDY OF ROCKS .... 35
• Introduction .... 36
• Types of Rocks .... 36
• Igneous Rocks .... 36
• Sedimentary Rocks .... 41
• Metamorphic Rocks .... 46
PART-IV
STUDY OF ROCKS
LAB WORK .... 51
• IGNEOUS ROCKS .... 53
• SEDIMENTARY ROCKS .... 85
• METAMORPHIC ROCKS .... 117
PART-V
STUDY OF GEOLOGICAL MAPS .... 149
• Introduction .... 150
• Format for Interpretation of a Geological Map .... 153
• Drawing a Geological Section .... 155
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PART-VI
STUDY OF GEOLOGICAL MAPS
LAB WORK .... 157
• Map 1: Showing Horizontal Beds
• Map 2: Showing Vertical Beds
• Map 3 & 4 : Showing Inclined Beds
• Map 5 : Showing Folded Beds
• Map 6 : Showing Unconformity
• Map 7 & 8 : Showing Faulted Beds
PART-VII
WORKED OUT MAPS (MAPS 1 TO 8) .... 175
PART-VIII
COLOUR PHOTOS OF COMMON MINERALS AND ROCKS .... 193
PART-I
STUDY OF MINERALS
• ROCK FORMING MINERALS
• ECONOMIC MINERALS
Engineering Geology Lab Record
Publisher : Laxmi Publications ISBN : 9789384872854Author : Dr. N. ChennaKesavulu
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